ACl-11 (Eocene of the United States)

Where: Clarke County, Alabama (31.5° N, 87.8° W: paleocoordinates 31.9° N, 80.0° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Cocoa Sand Member (Yazoo Clay Formation), Priabonian (38.0 - 33.9 Ma)

• supposedly "Bartonian"; stage assignment based on Baum et al. 1994; Section ACl-11

• group of beds-level stratigraphic resolution

Environment/lithology: marine; unlithified sandstone

Size class: mesofossils

Primary reference: L. D. Toulmin. 1977. Stratigraphic Distribution of Paleocene and Eocene Fossils in the Eastern Gulf Coast Region. Geological Survey of Alabama, Monograph 13(1):1-602 [M. Patzkowsky/K. Layou/P. Mannion]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 3542: authorized by Mark Patzkowsky, entered by Karen Layou on 04.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Neogastropoda - Conidae
"Conus tortilis" = Conus sauridens
"Conus tortilis" = Conus sauridens Conrad 1833 cone shell
Bivalvia
 Ostreida - Gryphaeidae
Gigantostrea trigonalis Conrad 1854 oyster
 Pectinida - Pectinoidae
Echinoidea
 Clypeasteroida - Protoscutellidae
Periarchus pileussinensis Ravenel 1844 sand dollar
Periarchus lyelli pileussinensis